User manual 3COM LS-3100-26TP-EI-H3-D-O

[. . . ] H3C S3100 Series Ethernet Switches Installation Manual Hangzhou H3C Technologies Co. , Ltd. http://www. h3c. com Manual Version: 20080115-C-1. 04 Copyright © 2007-2008, Hangzhou H3C Technologies Co. , Ltd. and its licensors All Rights Reserved No part of this manual may be reproduced or transmitted in any form or by any means without prior written consent of Hangzhou H3C Technologies Co. , Ltd. Trademarks H3C, , Aolynk, , H3Care, , TOP G, , IRF, NetPilot, Neocean, NeoVTL, SecPro, SecPoint, SecEngine, SecPath, Comware, Secware, Storware, NQA, VVG, V2G, VnG, PSPT, XGbus, N-Bus, TiGem, InnoVision and HUASAN are trademarks of Hangzhou H3C Technologies Co. , Ltd. All other trademarks that may be mentioned in this manual are the property of their respective owners. Notice The information in this document is subject to change without notice. [. . . ] The port is in active state and there is traffic on it. 1-36 Installation Manual H3C S3100 Series Ethernet Switches Chapter 2 Installation Preparation Chapter 2 Installation Preparation 2. 1 Precautions To avoid any device impairment and body injury resulting from improper use, please take the following precautions: Before cleaning the switch, disconnect the power. Do not place the switch on an unstable case or desk, because the switch might be damaged severely in case of a fall. Keep the switch room drafty and the switch ventilation hole free of obstruction. Make sure that the operating voltage is consistent with that labeled on the switch. To prevent electric shock, do not open the chassis while the switch is operating, and do not open the chassis arbitrarily even when the switch is powered off. Before changing interface cards, wear an ESD-preventive wrist strap to prevent the cards from being damaged by electrostatic discharge. 2. 2 Requirements on Environment S3100 Series Ethernet Switches must be used indoors. When you install your switch in a cabinet or on a desk, you must ensure: Enough space is reserved near the air-intake hole and the ventilation hole of the switch for heat dissipation of the switch chassis. The cabinet or the workbench takes good ventilation and heat dissipation system. The cabinet or the desk is solid enough to bear the weight of the switch and the accessories. To ensure normal operation and to prolong the life span of the switch, the following requirements on the installation site must also be satisfied. 2. 2. 1 Temperature/Humidity Requirements You should keep your equipment room within the proper temperature and humidity ranges to ensure the normal operation and working life of your switch. If the humidity in the equipment room is too high for a long time, it may decrease the insulation attribute of insulating material or even cause electric leakage of insulating material, and, sometimes, may change the mechanical performance of material and cause the 2-1 Installation Manual H3C S3100 Series Ethernet Switches Chapter 2 Installation Preparation rustiness and corrosion of metal parts. If the relative humidity is too low, the captive screws may become loose due to the shrinking of insulation washers; in addition, electrostatic is more likely to be produced in a dry environment, which may damage the circuit of the switch. High temperature for a long time will speed up the aging of insulation material, greatly lower the reliability of the switch and greatly reduce the life span of the switch. For the temperature and humidity requirements of different models, refer to section 1. 5 "Technical Specifications". 2. 2. 2 Cleanness Requirements Dust is a potential hazard to the safe operation of the switch. Falling on the equipment, it may cause electrostatic adsorption, and hence result in poor contact of the metal connectors or connection points. This is more likely to happen when the indoor relative humidity is low; in this case, it may not only shorten the device's working life, but also incur communication failure. The requirements on dust content and particle diameter in the equipment room are shown in the following table: Table 2-1 Requirements on dust content in the equipment room Physical active substance Dust particle particle/m³ Unit Content 3 × 10 (No visible dust on desk in three days) 4 Note: Dust particle diameter 5µm Besides the requirements on dust, rigorous requirements are also set on the content of chloride, acid, and sulfide in the air of the equipment room. These kinds of harmful gas will accelerate metal corrosion and aging of certain parts. The equipment room should be protected from the intrusion of harmful gases such as SO2, H2S, NH3 and Cl2. The limits of these kinds of harmful gas are shown in the following table. Table 2-2 Limits on harmful gas in the equipment room Gas SO2 H2S NH3 Cl2 0. 2 0. 006 0. 05 0. 01 Max content (mg/m³) 2-2 Installation Manual H3C S3100 Series Ethernet Switches Chapter 2 Installation Preparation 2. 2. 3 Anti-interference Requirements A switch in use may be affected by the interference from outside the system by way of capacitance coupling, inductance coupling, electromagnetic radiation, public impedance (including the grounding system) coupling or conducting line (power line, signaling line, and transmission line). Therefore, you should pay attention to the following: If AC supply system is TN system, AC power socket should be a single-phase three-line power socket with Protection Earth (PE) so that the filter circuit on the equipment can effectively filter out the interference coming from the power supply system. [. . . ] Power switch Normal operation indicator (green): On means that the arrester works normally. Power socket (complied with IEC standard), connected to the power supply of the equipment room through power cord Mainboard Multipurpose power socket, connected to the device protected by the arrester Overload auto protector, which can be manually reset. Figure A-1 Diagram of lightning arrester A-1 Installation Manual H3C S3100 Series Ethernet Switches Appendix A Lightning Protection of the Switch Caution: Make sure that the arrester is well grounded before using the lightning arrester for power. After inserting AC power cord plug of switch into the socket of lightning arrester, if the green LED is on and the red LED does not alarm, it means that the lightning arrester of power is running and the function of lightning protection has taken effect. You should correctly locate the problem, whether it is caused because the ground wire of the arrester is not well grounded or because the live and zero wires are connected in reverse direction. [. . . ]